外文翻译--基于案例的液压动力回路设计 英文版【优秀】.pdf

YWUEDICHCC2011,CCIS163,PP269–275,2011SPRINGERVERLAGBERLINHEIDELBERG2011CASEBASEDDESIGNFORHYDRAULICPOWERCIRCUITCHIMANVONG,PAKKINWONG,WENGFAIIP,ANDZHIXINYANGFACULTYOFSCIENCEANDTECHNOLOGY,UNIVERSITYOFMACAU,MACAU{CMVONG,FSTPKW,ANDYIP,ZXYANG}UMACMOABSTRACTTHISPAPERDESCRIBESTHEDESIGNANDIMPLEMENTATIONOFANAUTOMATICHYDRAULICCIRCUITDESIGNSYSTEMUSINGCASEBASEDREASONINGCBRASONEOFTHESUCCESSFULARTIFICIALINTELLIGENCEPARADIGMSTHEDOMAINOFCASEBASEDREASONINGANDHYDRAULICCIRCUITDESIGNAREBRIEFLYREVIEWEDTHENAPROPOSEDMETHODOLOGYINAUTOMATICCIRCUITDESIGNANDLEARNINGWITHTHEUSEOFCBRISDESCRIBEDFINALLYANAPPLICATIONEXAMPLEHASBEENSELECTEDTOILLUSTRATETHEUSEFULNESSOFAPPLYINGCBRININDUSTRIALHYDRAULICCIRCUITDESIGNWITHLEARNINGKEYWORDSCASEBASEDREASONINGCBR,ADAPTATIONCASE,HYDRAULICCIRCUITDESIGN1INTRODUCTIONTHEUSEOFCOMPUTERSINENGINEERINGDESIGNHASBECOMEAMAJORTRENDININDUSTRYTODAY,DIFFERENTCOMMERCIALAUTOMATICCOMPUTERAIDEDDESIGNCADSOFTWAREISAVAILABLETOAUTOMATETHEDESIGNPROCESSINMANYENGINEERINGAPPLICATIONSHOWEVER,CADSOFTWAREINHYDRAULICSYSTEMDESIGNISNOTASPROMINENTASINMANYOTHERAREASOFENGINEERINGDESIGNTHISISMAINLYDUETOTHECOMPLEXITYOFHYDRAULICANALYSISANDLACKOFAGREEMENTOFTHEMOSTAPPROPRIATEAPPROACHTOTHEDESIGNPROCESSINRECENTYEARS,MANYRESEARCHESONINTELLIGENTCADOREXPERTSYSTEMSFORHYDRAULICCIRCUITSHAVEBEENFOUNDINTHELITERATUREMOSTOFTHECADSYSTEMSAREBUILTFROMPRODUCTIONRULES1FORDESIGNKNOWLEDGEREPRESENTATIONORINTEGRATEDRULEBASEDANDOBJECTORIENTEDTECHNOLOGY2FORREDUCINGTHECOMPLEXITYINHYDRAULICSUBCIRCUITANDCOMPONENTREPRESENTATIONALTHOUGHTHEAPPROACHESAREEFFECTIVE,THEACQUISITIONANDMAINTENANCEOFRULESARETHEPROBLEMSFACINGBYNOTONLYTHESOFTWAREENGINEERSBUTALSOTHEDESIGNERSUSINGTHESOFTWAREMOREOVER,STATICLEARNING1ISANOTHERISSUEOFTRADITIONALRULEBASEDSYSTEMSTORESOLVETHEPROBLEMSINHERITEDFROMCONVENTIONALRULEBASEDEXPERTSYSTEMS,THEAICOMMUNITYPROPOSEDANOTHERREASONINGPARADIGMCALLEDCASEBASEDREASONINGCBRCBRSUPPORTSLEARNINGINTHEWAYTHATNEWKNOWLEDGECANBEAPPENDEDTOTHEKNOWLEDGEBASEWITHOUTWIDERRECOMPILATIONOFTHESYSTEMTHISISONEOFMAINADVANTAGESOFCBRTHATMAINTENANCEOFKNOWLEDGETAKESMUCHLESSTIMETHISPAPERSTUDIESTHEAPPLICATIONOFCBRINHYDRAULICSYSTEMDESIGNANDAPROTOTYPEAUTOMATICHYDRAULICCIRCUITDESIGNSYSTEMHASBEENDEVELOPEDTOVERIFYTHISPROPOSEDMETHODOLOGY1WHENEVERTHERULESAREUPDATED,THEWHOLESYSTEMHASTOBERECOMPILED270CVONGETAL2REVIEW21CASEBASEDREASONINGCBR3ISAMETHODOLOGYTHATALLOWSDISCOVERINGANALOGIESBETWEENACURRENTWORKINGSITUATIONANDPASTEXPERIENCESREFERENCECASESCBRMAKESDIRECTUSEOFPASTEXPERIENCESTOSOLVEANEWPROBLEMBYRECOGNIZINGITSSIMILARITYWITHASPECIFICKNOWNPROBLEMANDBYAPPLYINGITSSOLUTIONTOFINDASOLUTIONFORTHECURRENTSITUATIONCBRHASBEENUSEDTODEVELOPMANYSYSTEMSAPPLIEDINAVARIETYOFDOMAINS4,5,6,7,8,9,10,INCLUDINGMANUFACTURING,DESIGN,LAW,MEDICINE,ANDPLANNINGBASICALLYCBRISCONSTITUTEDWITHFOURRE’S3RETRIEVE––RETRIEVESIMILARPASTCASEMATCHEDAGAINSTCURRENTPROBLEMREUSE––REUSETOSOLVECURRENTPROBLEMBASEDONSOLUTIONOFPASTCASEREVISE––REVISETHEPASTSOLUTIONIFANYCONTRADICTIONOCCURSWHENAPPLIEDTOCURRENTPROBLEMRETAIN––RETAINTHEFINALSOLUTIONALONGWITHTHEPROBLEMASACASEIFTHECASEISUSEFULINTHEFUTUREWHENTHEUSERINPUTSAPROBLEM,THEPROBLEMISINTERPRETEDANDCONVERTEDASANEWCASEINTOTHESPECIFICFORMATOFTHEREASONINGSYSTEMTHENTHECONVERTEDNEWCASEENTERSTHESTAGEOFRETRIEVALWHERETHENEWCASEISMATCHEDAGAINSTTHEPREVIOUSCASESINTHECASELIBRARYOFTHEREASONINGSYSTEMINTHERETRIEVALSTAGEOFCBRUSUALLYASIMPLESIMILARITYFUNCTIONISEMPLOYEDTOFINDTHENEARESTNEIGHBORFORTHECURRENTPROBLEMFROMTHEREFERENCECASESTHEFORMULAISLISTEDIN1WHEREWIISTHEIMPORTANCEOFDIMENSIONI,FIIANDFIRARETHEVALUESFORFEATUREFIINTHEINPUTANDRETRIEVEDCASES,RESPECTIVELYFORSYMBOLICVALUESOFF,0IF1IFIRIRIIIIIRIIFFFFFF−≠211,,NIRIIIIRINIIWFFEFFWW−122HYDRAULICCIRCUITDESIGNHYDRAULICPOWERISONEOFPOWERTRANSMISSIONSYSTEMSANDCONTROLITCONVERTSMECHANICALENERGYTOHYDRAULICENERGYFORPRODUCINGUSEFULWORKSUCHASPRESSINGORLIFTINGTHEMAINTASKOFHYDRAULICPOWERSYSTEMDESIGNISCIRCUITDESIGNTHEGENERALPROCEDUREISSHOWNASFOLLOWSITHECIRCUITISDESIGNEDACCORDINGTOTHEINFORMATIONPROVIDEDBYTHECLIENTSUCHASMAXIMUMOPERATINGPRESSURE,MAXIMUMLOAD,SPEEDOFACTUATOR,DUTYCYCLEANDAPPLICATION,ETCIITHESIZESOFTHELINEARORROTARYACTUATORSAREDETERMINEDACCORDINGTOTHEMAXIMUMOPERATINGPRESSURE,MAXIMUMLOADANDLOADDISPLACEMENTIIICONVERTTHECALCULATEDACTUATORSIZESINTOSTANDARDSIZESCASEBASEDDESIGNFORHYDRAULICPOWERCIRCUIT271IVTHESYSTEMPARAMETERSSUCHASHYDRAULICOILFLOWRATE,PRESSURECHANGEOVER,ETC,AREDETERMINEDVTHESUITABLEACTUATORSUBCIRCUITS,PUMPANDPUMPSUBCIRCUITISSELECTEDBASEDONTHESYSTEMPARAMETERSANDTHEDESIGNSPECIFICATIONSVIOTHERHYDRAULICCOMPONENTSUSEDINTHECIRCUITAREFINALLYSELECTED3APPLYINGCBRININDUSTRIALHYDRAULICCIRCUITDESIGNINSECTION22STEPV,HYDRAULICENGINEERSAREUSUALLYACCUSTOMEDTOMODIFYANEXISTINGCIRCUITDESIGNINTOANEWONEFORDIFFERENTSITUATIONANDUSEITISBECAUSEHYDRAULICCIRCUITDESIGNISUSUALLYSIMILAREVENFORDIFFERENTSITUATION,SOHYDRAULICENGINEERSHAVETOMANUALLYLOOKTHROUGHMANYEXISTINGEFFECTIVECIRCUITSANDTHENSELECTASIMILARANDSUITABLEONEANDPERFORMMODIFICATIONTHEPROCESSISREPETITIVEANDTEDIOUSINTHESTAGEOFRETRIEVING,BECAUSEENGINEERSHAVETOREVIEWTHECIRCUITSONEBYONEHOWEVER,THEPROCESSOFTHERETRIEVINGANEXISTINGCIRC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